Report of the fit

Fit summary

Description: Test fit with the MAP 2021 parameterisation.
Minimiser: ceres
Random seed: 1234
Maximum values allowed for q_T / Q for Drell Yan dataset: 0.2
Maximum values allowed for q_T / Q for SIDIS dataset: min[ min[ 0.2 / z, 0.5 ] + 0.3 / (z*Q) ], 1 ]
Percentile cut: 5
Parameterisation: MAP22b2
Initial parameters fluctuations: False
Explicit formula:

f_{\rm NP}(x,\zeta, b_T)=\exp\left[ - \left( g_2 + \frac{1}{2}g_2 \log\left(\frac{\zeta}{Q_0^2}\right) \right) b_T^2 \right]\left[1 - \frac{\lambda g_1^2(x) b_T^2}{4(1 + \lambda g_1(x))}\right]\D_{\rm NP}(x,\zeta, b_T)= \frac{1}{g_{3 a\to h} +\big(\lambda_F/z^2\big) g_{3b a \to h}^{2}}g_{1,1b}(x) = N_{1,1b} \\g_{3,3b}(z) = N_{3,3b} \\Q_0^2 = 1;{}^2\\ = 0.1\\ = 0.5$$ t_0 prescription: True

Theory summary

Collinear PDF set: MMHT2014nnlo68cl member 0
Collinear FF set: DSS14_NLO_Pip member 0
Collinear FF set: DSS14_NLO_Pim member 0
Collinear FF set: DSS17_NLO_KaonPlus member 0
Collinear FF set: DSS17_NLO_KaonMinus member 0
b^* prescription: bstarmin
Perturbative order: N3LL
Reference value of the fine-structure constant: \alpha(Q = 91.1876\;{\rm GeV}) = 0.00776578395589 (running True)

Global statistical estimators

N_{rep} = 50
\chi_{0}^2 = 1.0592
\chi_{mean}^2 = 1.0592
\langle\chi^2\rangle \pm \sigma_{\chi^2} = 1.0626 \pm 0.0053
\langle E \rangle \pm \sigma_{E} = 2.0596 \pm 0.0562

Parameters

Fit properties

Table of \chi^2’s

TMDs in k_T space

Data-theory comparison